On Wednesday, the 'Edge of Glory' singer performed in a wheelchair while at a secret gig in Sydney, Australia. The stunt angered disability campaigners in the US, who accused GaGa of using the chair for "shock value", WENN reports.

"Since this isn't the first time she has used a wheelchair in her performances, I invite her to learn more about the 5.6 million Americans who live with paralysis," said Jesse Billauer, founder of the Life Rolls On Foundation. "They, like me, unfortunately, don't use a wheelchair for shock value."

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GaGa previously took to a wheelchair in the music video for her hit song 'Paparazzi'.

Billauer went on to invite the singer to come to a future event hosted by Life Rolls On where she could learn more about living with disabilities.

"I extend a personal invitation to Lady GaGa to attend one of our Life Rolls On events where quadriplegics and paraplegics surf, skate, and snowboard, so she can see how much is possible beyond a wheelchair." Billauer said. "Maybe that will be most shocking to her of all."